Connecting Digital Signals - Keithley DAS-8 Series User Manual

chap04_.fm Page 13 Thursday, August 22, 2002 1:37 PM
*Size resistor
so as not to
exceed 5 mA
+
Loop
Supply
6V to 36V
−
Loop
Supply
6V to 36V
−
*Size resistor
so as not to
exceed 5 mA

Connecting Digital Signals

You can connect the following digital signals to a DAS-8 Series board:
•
•
•
•
•
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Load*
Pin 20
DAC 0 Out
Pin 21
LL GND
Pin 20
+
DAC 0 Out
Pin 21
Load*
LL GND
Figure 4-12. DAS-8/AO Current Output
Digital input signal — Connect a digital input signal to the IP1, IP2,
or IP3 pin (pin 25, 26, or 27) on the main I/O connector.
Digital output signal — Connect a digital output signal to the OP1,
OP2, OP3, or OP4 pin (pin 7, 8, 9, or 10) on the main I/O connector.
External conversion clock — Connect an external conversion clock
to the INT_IN pin (pin 24) on the main I/O connector.
Hardware digital trigger or hardware gate — Connect a hardware
digital trigger or hardware gate signal to the IP1 pin (pin 25) on the
main I/O connector.
External interrupt — Connect an external interrupt to the INT_IN
pin (pin 24) on the main I/O connector.
+
Floating Load
−
DAS-8/AO Board
+
Grounded Load
−
DAS-8/AO Board
4-13